Heat-treating furnace



C. J. KIRK. HEAT TREATING FURNACE. APPLICATION FILED luNE 5, 1919.

Patented Apr. 20, 1920.

sTaTns TnTnriT CHRLES Il'. KIRK, OF NEW CASTLE, PENNSYLVANL.

HEAT-TREATING FURNAGE.

Spectcation of Letters Patent.

Eatented Apr. 209-1920.

Application led .Tune 5, 1319. Serial No. 301,975.

Treating Furnaces; and l do hereby declare i the following to be a full,clear, and exact description thereof.

My invention relates to a heat treating furnace.

, ln an application filed by me on the 1st of March, ieit, Semi No.280,131, I have illustrated and described a heat treating furnace inwhich the objects to be heated are not subjected directly to the hotproducts of combustion, but are subject to the indirect action of theheat and-suitable for the burning of pottery or the annealing of metal.ln that application, the furnace was divided into two compartments withtracks in each compartment, the cars on one track entering iii theopposite direction from the cars on the other track, provision beingmade for utilizing the heat emanating from the heated cars, and theobjects carried thereby on one track for aiding and heating the objectson the cars entering the furnace from the opposite end on the othertrack, by providing the partition wall with a series of openings at thetop and bottom to allow for the free circulation, so that the' hot airpassing through the upper openings.

will pass down through the other .compartment, and through the loweropenings back into the original compartment whereby a constantcirculation is maintained and the time required for treatmentgreatlyreduced' as well as the amount of fuel required.

The present invention has relation to a furnace of this character andthe special iinprovement will be more particularly herein-V after setforth and claimed.

` ln the accompanyingvdrawing, Figure l is a plan view partly in sectionbroken away of my improved furnace; Fig. 2is a longitudinalsectionbroken awaypFig. 3 is an enlarged cross section on the line 3 -3, Fig.l; and Fig. a is a longitudinal vertical section of a portion of one ofthe compartments of the furnace showing the face of the inner wallthereof. l

fin the drawing,jthe numeral 2 designates a suitable base or foundationupon which the furnace is erected, said furnace consisting of the sidewalls 3 and the top or crown 4. The heating furnace 5 is divided intotwo compartments-by the partition wall G which also aids to strengthenand support the roof 4. This partition wall is provided with the opening7 arranged at intervals at the top and adjacent to the bottom thereof,

and preferably staggered with relation tof each other.

Suitable combustion chambers 8 and 9 are 4provided at each side of thefurnace for supplying the heat whether aseous or solid fuel is employed.PEhese urnaces may be of any suitable construction, and l `have onlyillustrated them in a diagrammatic form in Fie'. 1.

Communicating with the combustion chambers 8 and 9 are the lues l0 andl1, respectively, in the side walls of the furnace. The flues 10communicate with each other through the flue l2 which passes over thetop of the furnace chamber 5 and the ilues 11 communicate through a likeflue 13.

'ljhese flues i0 and ll are non-communicating, being separated from eachother by the wall i4. lOutlet flues l5 and 16 are provided for the fluesl() and 11, respectively.

T he inner walls of the ueslO and 11 are .made'up of hollow tiles 17,said tiles being supported on the ledge 18 and being set close togetherto form tight joints with each other. rlhe upper and lower ends of thesetiles are open communicating with the two compartments of the heatingchamber and the upper and lower ends of said tiles are preferablybeveled as indicated at 19. 7lhese tiles form an insulating wall betweenthe flues 10 and 1l and the heating chamber, so that the heat from saidfiues is not directly conveyed through the wall to the objects to betreated but the hollow tiles furnish an opportunity for the circulationof the air so as to protect said base against the direct radiation, andfurthermore, the wall itself is protected. and its life prolonged.

Within the heating chamber are the tracks 20 and 2l upon which the cars22 and 23 trayel, respectively, said cars being made up .of suitablerefractory material to withstand the high heat to which they aresubjected in passing through the furnace. The objects 24 to be heatedare arranged upon said The ends of the furnace are provided withsuitable doors 25.

In the operation of the furnace, the Ware mounted on the cars 22 isintroduced into the furnace at one end, and the Ware mounted on the cars23 is introduced on the opposite track at the other end of the furnace.Heat from the combustion chambers 8 and 9 passes through the iues 10and'll, and also by the lues' l2 and 13 to the lues at theloppositeside. C ars of the ware as they pass through the heating chamber areheated to a high temperature getting hotter as they near the dischargeend. Accordingly the heat given off byi said highly heated cars and theobjects carried thereon ascending will pass through the4 openings 7 nthe partition 6, and said heat is employed for assisting in the heatingof the cold cars which are coming in on the next track in the oppositedirection inthe next compartment of the heating chamber. These cold carsbeing cooler, vchill the air and it passes through the bottom openings 7in 'the partition wall and passes up through the heated cars on theopposite track, and being heated thereby, ascends and escapes throughthe openings 7, thereby creating a circulation. There will also be. acirculation of heat through the hollow tiles 17, as they communicate topand bottom with the heating chambers, and this will further greatlyincrease the heating efficiency of the furnace, and instead of therebeing a direct radiation .of the heat from the ues l0, the hollow tilesprovide for the passage of heated air which protects the furnace wallsand at the same time gives better circulation.

It is apparent that instead of the use of the individual tiles formingthe inner wall of the iue Vl0,- other constructions may beemployedproviding for such a. hollow wall,

and such modified constructions are included within the scope ofomyinvention.

What I claim is:

1. In a heat treating furnace having a heating chamber, heating'iiuesformed in the side walls of said furnace, a longitudinal partition walldividing said chamber into two compartments, said partition havingopenings at its upper and lower portions, the inner sides of said Wallsof said heating filles forming side walls of said heating chamber havingan air space communicatlijng top and bottom with said heating cham- 2.In a heat treating furnace having a heating chamber, heating fluesformed in said walls of said furnace, a longitudinal partition walldividing said chamber into two compartments, said partition havingopenings at its upper and lower portion. hollow tiles forming the innerwall of said heating lues and the side walls of said heating chamber,said hollow tiles-communicat ng top and bottom with said heating cham-3. In a heat treating furnace having a heating chamber, heating finesformed in said Walls of said furnace, a longitudinal partition walldividing said chamber into two compartments, said partition havingopenings at its upper and lower portion, hollow tiles forming the innerwall of said heating fines to the side walls of said heating chamber,said tiles having beveled upper ends and communicating top and bottomwith said heating chamber.

In testimony whereof, I the said CHARLES J. KIRK, have hereunto set myhand.

CHARLES J., KIRK.

Witnesses:

RoBT. D. Tor'rEN, A. E. CLANcr.

